Rebecca was born and raised in La Push, Washington. During childhood, she and her siblings were sometimes acquainted with Charlie Swan's daughter, Bella, though they never became real friends.

When her mother died in a car accident, it hit her family hard, but she and Rachel helped their brother, Jacob, recover from the pain by taking their mother's place in the house, temporarily ignoring their own pain. She met a professional surfer from Hawaii named Solomon Finau and married him as soon as she turned eighteen years old. She followed him to Hawaii to live with him, and travels with him for his competitions. Part of her reason for leaving La Push was to escape the memories of her deceased mother.

Neither she nor her husband know about the existence of vampires or shape-shifters. Like her mother, Rebecca is a painter, though she prefers oil.